Touch-Screen User Interface

ABSTRACT

A user interface for a touch-screen display of a dedicated handheld electronic book reader device is described. The user interface detects human gestures manifest as pressure being applied by a finger or stylus to regions on the touch-screen display. In one implementation, the touch-screen user interface enables a user to turn one or more pages in response to applying a force or pressure to the touch-screen display. In another implementation, the touch-screen user interface is configured to bookmark a page temporarily by applying a pressure to the display, then allowing a user to turn pages to a new page, but reverting back to a previously-displayed page when the pressure is removed. In another implementation, the touch-screen user interface identifies and filters electronic books based on book size and/or a time available to read a book. In another implementation, the touch-screen user interface converts text to speech in response to a user touching the touch-screen display.

BACKGROUND

A large and growing population of users is enjoying entertainmentthrough the consumption of digital media items, such as music, movies,images, electronic books, and so on. The users employ various electronicdevices to consume such media items. Among these electronic devices areelectronic book readers, cellular telephones, personal digital assistant(PDA), portable media players, tablet computers, netbooks, and the like.One particular device that is gaining in popularity is the dedicatedelectronic book (“eBook”) reader device, which attempt to mimic theexperience of reading a conventional book through display of electronicinformation on one or more electronic displays. As the quantity ofavailable media content continues to grow, along with increasingproliferation of such dedicated devices to consume that media content,finding ways to enhance user experience continues to be a priority. AseBook readers continue to evolve, there remains a need for improving areader's ability to hold and interact with the readers.

BRIEF DESCRIPTION OF THE DRAWINGS

The detailed description is described with reference to the accompanyingfigures. In the figures, the left-most digit(s) of a reference numberidentifies the figure in which the reference number first appears. Theuse of the same reference numbers in different figures indicates similaror identical components or features.

FIG. 1 illustrates one illustrative implementation of a handheldelectronic book (“eBook”) reader device and a block diagram showingillustrative components that may be implemented in the eBook readerdevice.

FIG. 2 is a flow diagram illustrating an illustrative process of using atouch-screen user interface to initiate various operations.

FIG. 3 is a front plan view of the eBook reader device illustrating aplurality of microphones positioned near the display.

FIG. 4 is a front plan view of the eBook reader device illustrating atouch-screen display page turning mechanism.

FIG. 5 illustrates another view of the touch-screen display page turningmechanism.

FIG. 6 is a flow diagram illustrating an illustrative process of turningpages using the touch-screen display of the eBook reader device.

FIG. 7 illustrates another page turning mechanism and a mechanism forbookmarking a page.

FIG. 8 illustrates the touch-screen display after the page turning FIG.9 illustrates a return to the bookmarked page accompanied by a hapticindication.

FIG. 10 is a flow diagram illustrating an illustrative process of pageturning and returning to a bookmarked page.

FIG. 11 illustrates a book list displayed on the eBook reader device.

FIG. 12 illustrates the eBook reader device displaying a subset of thebook list in FIG. 11.

FIG. 13 is a flow diagram illustrating an illustrative process offiltering a book list.

FIG. 14 illustrates a mechanism for selecting an amount of reading time.

FIG. 15 illustrates a book list based on the selected amount of readingtime in FIG. 14.

FIG. 16 illustrates a mechanism for the eBook reader device to read textdisplayed on the touch-screen display.

FIG. 17 illustrates a mechanism for the eBook reader device to read textdisplayed on the touch-screen display.

FIG. 18 is a flow diagram illustrating an illustrative process of usinga touch-screen display to facilitate conversion of text to speech forexcerpts of displayed text.

FIG. 19 is a block diagram showing illustrative components that may beimplemented in subsystems of the eBook reader device of FIG. 1.

DETAILED DESCRIPTION

This disclosure is directed to user interfaces for a handheld electronicbook (“eBook”) reader device designed to allow users to read electroniccontent (e.g., text, graphics, multimedia, and the like), such as thatfound in electronic books, magazines, RSS feeds, newspapers, and thelike. To improve user interaction, the display mounted in the eBookreader device is a touch-screen display capable of functioning as bothan input and an output device.

The terms “book” and/or “eBook”, as used herein, include electronic ordigital representations of printed works, as well as digital contentthat may include text, multimedia, hypertext, and/or hypermedia.Examples of printed and/or digital works include, but are not limitedto, books, magazines, newspapers, periodicals, journals, referencematerials, telephone books, textbooks, anthologies, instruction manuals,proceedings of meetings, forms, directories, maps, web pages etc.Accordingly, the terms book and/or eBook may include any content that isin electronic or digital format.

With such eBooks, the content may be structured as virtual framespresented on the device and a user may turn or change from one virtualframe or “page” of electronic content to another. It is further notedthat various aspects and features described herein may be implemented inother electronic devices or electronic readers besides eBook readerdevices including, for example, portable computers, personal digitalassistants (PDAs), portable gaming devices, wireless phones, and thelike.

The user interfaces described herein utilize the functionality of adisplay, which also includes a touch screen. By generating input throughtouching the displayed “page” the user interfaces described belowprovide an intuitive mechanism for a user to interact with the eBookreader device.

Illustrative Ebook Reader Device Architecture

FIG. 1 illustrates an illustrative device architecture 100 which, in onepossible implementation, is a handheld dedicated eBook reader device102. The eBook reader device 102 has a touch-screen display 104. TheeBook reader device 102 may also include a keyboard 106 or other typesof actuatable elements that may have dedicated or assigned operations.For instance, the device 102 may have a power on/off button, selectionkeys, joystick, touchpad, and so forth.

The touch-screen display 104 presents content in a human-readable formatto a user. The content presented in the touch-screen display 104 maytake the form of electronic books, newspapers, or other readable orviewable materials. For example, the touch-screen display 104 providesthe text of the electronic books and also depicts any illustrations,tables, or graphic elements that might be contained in the electronicbooks. The touch-screen display 104 is implemented with touch-sensitivetechnology which is responsive to user input registered via, forexample, a finger, a stylus, or other similar pointing device.

As illustrated in FIG. 1, the eBook reader device 102 has variousinternal components, which include user interface subsystems 108.Examples of such components may include one or more user inputcontroller(s) 110, a page turn detector 112, a bookmarking module 114, abook filtering module 116, and a text-to-speech module 118. The one ormore user input controllers 110 are also provided to capture user inputvia the touch-screen 104, the keyboard 106, and any other user inputelement on the eBook reader device 102.

In some implementations, the one or more user input controller(s) 110may include a touch-screen pressure detector 120. The touch-screenpressure detector 120 detects not only the presence of pressure againstthe touch-screen display 104, but also an amount of pressure applied tothe touch-screen display 104. By detecting pressure as acontinually-variable input rather than simply as an on/off binary input,the touch-screen pressure detector 120 can differentiate between a softtouch and a hard touch in addition to detecting direction and speed ofcontact with the touch-screen 104. The touch-screen pressure detector120 can provide three-dimensional input by detecting where on the screenpressure is applied (i.e., x-dimension and y-dimension) and the amountof pressure applied to that point (i.e., z-dimension). Thus, the samepressure applied to different points on the surface of the touch-screen(e.g., lower-left hand corner or upper-right hand corner) generatesdifferent input signals as well as different pressure applied to thesame point on the surface of the touch-screen (e.g., hard versus softpressure on a point on the screen).

User input may be further differentiated by duration. In someimplementations, the amount of time that the touch-screen display 104detects pressure generates a different input signal. Duration or time ofcontact may be thought of as providing an alternative third dimension(i.e., time of contact is the z-dimension instead of pressure) or timemay supply a fourth dimension in addition to pressure (i.e.,x-dimension, y-dimension, pressure, and time). For example, pressing alocation on the display 104 for a short period of time may signal apage-turn command while pressing the same location for a long period oftime may signal a bookmark command. Furthermore, a short, hard pressure;a short, soft pressure; a long, hard pressure; and a long, soft pressuremay all correspond to a different commands or inputs.

In addition to pressure at a single point, a force applied to an areamay be discernable by the touch-screen pressure detector 120. In someimplementations, the force is calculated by summing the pressuredetected at several points. For example, a user's thumb may contactseveral pressure sensors simultaneously due to the size and shape of athumb. In this example, the pressure detected by all the sensorscontacted by the thumb may be summed to determine an amount of force.

The page turn detector 112 detects an input corresponding to a commandto change the displayed page on the eBook reader device 102. The commandmay be generated by a key on the keyboard 106, an object such as theuser's finger swiped across the touch-screen display 104, a pressureapplied to a point on the touch-screen display 104, and the like.Examples of page turning mechanisms are described below in more detailwith reference to FIGS. 2-4.

The term “page” as used herein refers to a collection of content that ispresented at one time in the touch-screen display 104. Thus, a “page” asdescribed herein may be understood as a virtual frame of the content, ora visual display window presenting the content to the user. Thus,“pages” as described herein are not fixed permanently, in contrast tothe pages of published “hard” books. Instead, pages described herein maybe redefined or repaginated when, for example, the user chooses adifferent font for displaying the content in the touch-screen display104.

The bookmarking module 114 bookmarks a page so that the user may rapidlyreturn to the page after viewing other pages. In some implementations,the bookmarking module 114 operates in conjunction with the page turndetector 112. Examples of bookmarking mechanisms are described below inmore detail with reference to FIGS. 5-7.

A book filtering module 116 is provided to identify and filter booksstored on, or accessible by, the eBook reader device 102 according toeither book size or a time-based parameter. The book filtering module116 orders a list of books for display on the eBook reader device, andthe ordered list may include visual elements to convey length orduration of the books. Responsive to user input, the book filteringmodule 116 may further filter the list to form subset lists. Examples offiltering mechanisms are provided below in more detail with reference toFIGS. 8-12.

The text-to-speech module 118 converts text displayed on thetouch-screen display 104 into an audible reading of the text. The textfor conversion to speech may be indicated by an object on or near thetouch-screen display 104 such as the user's finger moving over thedisplayed text. Examples of user interfaces for text-to-speechconversion are described below in more detail with reference to FIG. 13.

FIG. 2 shows a process 200 for using a touch-screen user interface toinitiate various operations, such as turning pages, bookmarking pages,filtering books according to size, and converting text to speech. Forease of understanding, the process 200 (as well as processes 500 in FIG.5, 900 in FIG. 9, 1200 in FIG. 12, and 1600 in FIG. 16) is delineated asseparate acts or operations represented as independent blocks. However,these separately delineated acts should not be construed as necessarilyorder dependent in their performance. The order in which the process isdescribed is not intended to be construed as a limitation, and anynumber of the described process blocks maybe be combined in any order toimplement the process, or an alternate process. Moreover, it is alsopossible that one or more of the provided processes will be omitted.

At 202, content is displayed on a touch-screen display 104 of the eBookreader device 102. The content may be text from an electronic document,or it may be a list of items (such as book titles), or other text-basedcomponents.

At 204, a pressure applied by an object on the touch-screen display isdetected. As noted above, the object may be a human finger, a stylus, orother type of pointing mechanism. In one implementation, thetouch-screen pressure detector 120 detects both placement of the objecton the touch-screen display 104 at 204(1), as well as an amount ofpressure being applied by the object to the touch-screen display 104 at204(2). In some cases, the placement of the object may be a point withina region. In other cases, the placement may be interpreted as a swipeacross the touch-screen display.

At 206, an operation is initiated in response to the application of theobject to the touch-screen display. There may be any number ofoperations that can utilize varying degrees of pressure to execute theoperation in different ways. In one scenario, the operation may beturning pages in an electronic book. For instance, the page turningdetector 112 may turn one or more pages depending upon the amount ofpressure applied to the touch-screen display. In another scenario, theoperation may be bookmarking a page, where the bookmarking module 114interprets pressured applied to a particular region as a command tobookmark the page temporarily. These and other scenarios are describedbelow in more detail.

At 208, the results of the operation are displayed on the touch-screendisplay. Depending on the operations being performed, the results willvary widely. Example results for the scenarios just discussed may be anew page, or redisplay of a bookmarked page.

FIG. 3 shows an alternate implementation of the touch-screen display 104of the eBook reader device 102 shown in FIG. 1. In this implementation,three-dimensional input may be generated by two or more microphones 302instead of, or in conjunction with, a touch screen that senses pressure.The microphones 302 may detect the sound of an object tapping thesurface of the display 104 of the eBook reader device 102. The objectmay be a stylus, a fingernail, or the like. Comparison of the relativevolume of the sounds detected by each microphone 302 may be used tocalculate a relative distance from each microphone 302, and thus, aposition on the surface of the display 104. With two microphones, aquadrant of the display (e.g., upper-right, lower-right) may beidentified. With three or more microphones 302, a more specific positionon the display 104 may be triangulated. The microphones 302 may beintegrated into the housing of the eBook reader device 102 at or nearone or more corners of the display 104. The third dimension (i.e.,z-dimension) may be determined by distinguishing between a loud tap anda soft tap. A loud tap can be correlated with a greater amount of forceand a soft tap can be correlated with a lesser amount of force. Thetotal volume detected by all the microphones 302 may be summed todetermine the loudness of a tap.

These are but a few examples. More details of possible scenarios areprovided below with reference to FIGS. 4-19. However, these examples arenon-limiting and the architecture 100 may be used to support otherconfigurations and usage scenarios.

Page Turning Based on Force

In the first usage scenario, page turning in an eBook reader device isachieved by sensing pressure applied in different ways to thetouch-screen user interface. Depending on the force or gesture, one ormore pages may be turned forward or backward. Examples are describedbelow with reference to FIGS. 4-6.

FIG. 4 shows a user interface representation 400 of the handheld eBookreader device 102 displaying a page of text on the touch-screen display104. Pressure on the touch-screen display 104 by an object such as theuser's finger or a stylus may cause the eBook reader device 102 todisplay a different page of an electronic document analogous to turninga page of a physical book. The page turn detector 112 may analyze inputreceived by the touch-screen display 104 to implement a page-turncommand.

Recall from above that a “page” as described herein may be understood asa virtual frame of the content, or a visual display window presentingthe content to the user. The pages presented on the eBook reader device102 and turned using the touch-screen display 104 may not corresponddirectly to the identical hard pages in the associated physical book.Depending on display capabilities, font size, and other such parameters,any given “page” displayed on the eBook reader device 102 may containmore or less text/graphics than the corresponding hard page. Thus, thepage turning mechanism 112 turns pages in the sense of changing from onedisplay frame to another. A visual representation of a “page,” such as apage number 302, may assist the user in distinguishing one page fromanother. In this example, the page number is “50”. Additionally, avisual representation of turning pages, such as a changing page number,may provide visual confirmation that pages are turning In otherimplementations, a graphic element such as a representation of book withturning pages may be displayed instead of or together with the pagenumber to provide a visual representation of the turning pages. Further,in place of page numbers, a progress graphic may be used to representthe user's progress through the content. Audio and/or haptic feedbackmay also be used to provide an indication of pages turning For example,a sound of actual paper pages of a book being turned could be playedeach time the “page” of an eBook is turned.

In one implementation, specific regions of the touch-screen display 104may be configured to be responsive to pressure, such that when pressedby the user, initiates functions to turn pages forward or backwards. InFIG. 4, the screen UI includes two regions: a region 404 for turningpages forward and a region 406 for turning pages backwards. In oneimplementation, the region 404 for turning pages forward is located inthe lower right side of the touch-screen display 104 and the region 406for turning pages backwards is located in the lower left side of thetouch-screen display 104. In these locations, the user can hold theeBook reader device 102 with two hands, and turn pages of an electronicdocument using his or her right and left thumbs, similar to how the userwould leaf through a physical paperback book. The regions 404 and 406may be sized appropriately to accommodate the user's thumb.

In some embodiments, the region 404 for turning pages forward may occupythe entire right half of the touch-screen display 104 and the region 406for turning pages backwards may occupy the entire left half of thetouch-screen display 104. The correlation between right-forward andleft-backwards may be switched based on user settings or language of thedisplayed document. In other implementations, the region for turningpages forwards may be at the bottom of the touch-screen display 104 andthe region for turning pages backwards may be at the top of thetouch-screen display 104. Location of the regions 404, 406 may alsodepend on the orientation of the eBook reader device 102 such that ifthe user rotates the eBook reader device 102 the location of thepage-turn regions 404, 406 moves accordingly. Orientation of the eBookreader device 102 may be detected, in some implementations, by anaccelerometer integrated into the device. For example, the page-turnregions 404, 406 may stay in the lower-right and lower-left corners ofthe touch-screen display 104 as the eBook reader device 102 is rotated.

As discussed above, the touch-screen pressure detector 120 detects anamount of pressure or force applied to the touch-screen display 104. Thenumber of pages turned may be proportional to the amount of pressureplaced on one of the page-turn regions 404, 406. As a larger amount offorce is applied to a page-turn region 404, 406, a greater number ofpages are turned in proportion to the amount of force. Mechanical forcemay be applied to a page-turn region 404, 406 by any means. Forinstance, the user may place her thumb on the touch-screen display 104and “pinch” the eBook reader device 102 between her thumb and her indexfinger. As another approach, the user may place the eBook reader device102 on a table and pressing down with a stylus.

In other implementations, the speed at which pages turn may vary inproportion to the amount of pressure applied to a page-turn region 404,406. More pressure may cause the pages to turn faster. The number ofpages turned and the speed of pages turning may both vary proportionallyto the amount of pressure. For example, greater pressure on one of thepage-turn regions 404, 406 may cause more pages to turn and the pages toturn faster. A threshold amount of force for turning a greater number ofpages and/or for turning pages at a faster speed may be adjustable bythe user. For example, the user may define an amount of pressure as theforce necessary to turn ten pages at one time. The user may also definean amount of pressure, for example, as the pressure necessary to turn 60pages a minute.

Alternatively, the threshold amount may be inferred over time fromobserving user behavior. If the user consistently pages backwards afterapplying a pressure to turn pages, it may be inferred that the user didnot want to turn that many pages for the applied pressure. Hence, thenext time the same pressure is applied, the device may turn fewer pages.

Gestures other than press-and-hold may generate page-turn commands. Forexample, swiping an object (e.g., finger, stylus, etc.) across thetouch-screen 104 may generate a page-turn command. The number of pagesturned may increase in proportion an amount of force applied against thetouch-screen 104 during the swiping gesture. Turning pages with swipinggestures are described in more detail below with reference to FIG. 7.The number of pages turned may also depend on a number of fingers usedfor the swiping gesture or pressed against the page-turn regions 404,406. For example, one finger turns one page, two fingers turns twopages, three fingers turns three pages, and so forth. Alternativecorrelations between the number of fingers and the number of turnedpages are also possible.

In some circumstances, the user may desire automatic page turning sothat the next page will be displayed without user input. In order toallow the user sufficient time to read a page before the automaticturning, but not so much time that the user is waiting excessively forthe next page to be displayed, a speed of the automatic page turning maybe based on an average of previous manual page turning speeds. Forexample, if over the last three pages of a displayed document the userhas entered a manual page turn command after 20, 21, and 19 secondintervals, the eBook reader device 102 may begin automatically turningpages every 20 seconds. In some implementations, a user input initiatingautomatic page turning is required.

FIG. 5 shows a user interface representation 500 displaying a next pageof text on the touch-screen display 104 of the eBook reader device 102,following from a page turning operation by the device 102 as shown inFIG. 4. A visual representation of a displayed page is indicated by apage number 502. In this example, the page number is “51” whichrepresents one page “forward” relative to the page number “50” shown inFIG. 4. The change in pages from FIG. 4 to FIG. 5 resulted from pressureapplied to the forward page-turn region 404 such that the amount offorce exerted against the touch-screen display 104 correlated withturning one page. In some embodiments, a greater amount of force appliedto the page-turn region 404 will turn more than one page at a time.Turning pages backwards functions in analogous manner in response topressure on the backward page-turn region 406.

While the pages are “turning”, the eBook reader device 102 and/or thedisplay 104 may require time for processing or refreshing the displayedimage. Particularly, when many pages are turned at one time, thetransition between pages may not be instantaneous. In embodiments wherethe user interface displays the visual representation of the turningpages, the visual representation may be displayed during the transitiontime. For example, changing from page 50 to page 51 may be representedby scrolling numbers similar to digits displayed in an automobileodometer. In other embodiments, page 50 may visually morph to page 51,such as through visual techniques that represent a page turning in aphysical book.

FIG. 6 shows a process 600 for turning pages using the touch-screendisplay 104 of the eBook reader device 102. At 602, a first page of anelectronic document is displayed on the touch-screen display 104 of theeBook reader device 102. This is shown, for example, in the userinterface representation 400 in FIG. 4, where a first page “50” isdisplayed.

At 604, an amount of pressured is detected within a region on thetouch-screen display. In the implementation described above, forexample, the pressure may be applied by an object to either the forwardpage-turn region 404 or the backward page-turn region 406.

At 606, a determination is made whether the pressure is applied in thefirst or second region. If applied to the first region (e.g., the “firstregion” branch from 606), one or more pages are turned forward inproportion to the amount of pressured applied to the first region at608. If applied to the second region (e.g., the “second region” branchfrom 606), one or more pages are turned backward in proportion to theamount of pressured applied to the first region at 610.

Snapping Back to a Bookmarked Page

In another usage scenario, a user may wish to mark one page, flip toanother page, and then return to the previously marked page. Thismanipulation may be achieved with a physical book by book marking thepage that the user wishes to return to by placing a finger on the pageor inserting a bookmark. As described below in reference to FIGS. 7-10,analogous bookmarking may be achieved with the eBook reader device 102.These bookmarking techniques leverage aspects of the touch-screen userinterface of the eBook reader device, as will be described below in moredetail.

FIG. 7 shows a user interface representation 700 of the eBook readerdevice 102 for displaying a page of text on the touch-screen display 104while receiving a page-turn command. In this implementation, thepage-turn command is generated by a gesture 702 made by an object on ornear the touch-screen display 104. The gesture 702 may be generated by auser swiping his finger across the surface of the touch-screen display104. The user input controller(s) 110 may determine the direction of theswiping gesture. The page turn detector 112 may interpret the receivedinput as a command to turn pages forward or turn pages backwards. FIG. 7shows a gesture 702 made from right to left. The right-to-left gesturemay correlate with a command to turn pages forwards. Similarly, aswiping motion from left to right may correlate with a command to turnpages backwards. Motions from top to bottom and bottom to top may alsobe used to turn pages. In some implementations, direct contact with thetouch-screen display 104 is not necessary for detection of the objectmaking the swiping gesture. For example, a camera may optically track auser's hand, or other object such as a stylus, as it moves across thescreen relative to the camera. As an additional or alternative motiontracking mechanism, an infrared light emitting diode may emit light thatis reflected back to a detector such that the emitter/detectorcombination can correlate a disturbance in the emitted light with thelocation of an object near the screen. Further, in some implementations,the page-turn command may be an actuation of a control that is not partof the touch-screen display, such as a button or joystick along the sideof the eBook reader device 102.

In one implementation, the user interface 700 shown in FIG. 7 may alsoinclude a defined area 704 of the touch-screen 104 which, when pressedby the user, indicates that the currently displayed page is a page theuser wishes to bookmark. The bookmarking module 114 may function tointerpret the pressure applied to the defined area 704 as an indicationthat the bookmark should be set for the displayed page. Thus, thedefined area 704 serves as a button to bookmark a page. In oneimplementation, the bookmark button 704 is located in the lower-leftcorner of the touch-screen display 104. In this configuration, the usermay activate the bookmark button 704 with his left thumb while holdingthe eBook reader device 102 in his left hand. The bookmark button 704 isnot limited to any particular shape or placement on the touch-screendisplay 104. For example, left-handed users may configure the eBookreader device 102 such that the bookmark button 704 is on thelower-right corner of the touch-screen display 104. In someimplementations, the page displayed in FIG. 7 may also include a visualrepresentation 706 of a page number corresponding to the displayed page(e.g., “p. 50”).

FIG. 8 shows another user interface representation 800 of the eBookreader device 102 displaying a page of text following a page-turncommand. As described above, the page-turn command is processed by thepage turn detector 112 in response to a gesture 702 made by an object onor near the touch-screen display 104, pressure on a page-turn region404, 406, pressing a button on the keyboard 106, pressing one of theother controls, or the like. In this example, the visual representation802 of the page number indicates that 10 pages were turned from page“50” shown in FIG. 7 to page “60” shown in FIG. 8.

In one implementation, page 60 is displayed as long as the pressure ofthe object (e.g. a finger or stylus) is detected on the bookmark button704. Once the pressure is no longer detected on the bookmark button 704,the eBook reader device 102 redisplays the bookmarked page, which inthis example is page 50 shown in FIG. 7. With this implementation, theuser may hold the eBook reader device 102 with his left hand, press onthe bookmark button 704 with his left thumb, and flip through pages byswiping a finger of his right hand across the touch-screen display 104.Upon releasing the left thumb, the eBook reader device 102 “snaps back”to the page that was displayed when the user placed his left thumb onthe bookmark button 704.

FIG. 9 shows a user interface representation 900 in which the eBookreader device 102 redisplays the page originally displayed in FIG. 7,but optionally accompanies this display with a haptic indication. Thevisual representation 902 of the page number shows that, in thisexample, the text has been returned to page “50”. Redisplaying thebookmarked page once pressure is removed from the touch-screen display104 may be instantaneous or near instantaneous. In one implementation,the “snap back” may occur without an accompanying visual representationof turning pages. In a same or different implementation, a hapticindication accompanies the redisplaying the bookmarked page. The hapticindication provides the user with tactile feedback analogous to turninga large number of pages of a physical book at one time. In oneimplementation, the haptic indication may be a vibration created by avibrator, a low-frequency sound produced by a speaker, or the like. Thehaptic feedback may be accompanied, or even replaced, by audio feedback.

FIG. 10 illustrates a process 1000 for bookmarking a page of anelectronic document using the touch-screen display 104 of the eBookreader device 102.

At 1002, a first page of an electronic document is displayed on thetouch-screen display 104 of the eBook reader device 102. The display maybe similar to the UI representation 600 shown in FIG. 6.

At 1004, pressure is detected on the touch-screen display 104. Thepressure may be detected in a defined area of the touch-screen 104, asdescribed above in FIG. 7. The pressure may be caused by an object, suchas a stylus or a user's finger. The pressure is interpreted by thebookmarking module 114 as a command to bookmark the currently displayedpage.

At 1006, a command to turn pages is received. This page-turn command maybe received by the page turn detector 112. The command to turn pages maycause one or more pages to be turned forwards or backwards. Page-turncommands are described in more detail above in FIGS. 4-6.

At 1008, a second page of the electric document is displayed on theeBook reader device 102. The second page is displayed in response to thecommand to turn pages received at 1006. The second page is notnecessarily adjacent to the first page in the pagination of thedocument. For example, if the command to turn pages is a command to turn10 pages, or alternatively 10 repetitions of a command to turn one page,the second page of the document displayed in process 1000 will be a pagethat is 10 pages away from the first page of the document displayed at1002.

At 1010, a determination is made as to whether pressure is stilldetected on the touch-screen display 104. In one implementation, thecontinued presence or absence of pressure at the bookmark button 704 isdetected. The determination may be performed by the bookmarking module114. If pressure is still detected (i.e., the “Yes” branch from 1010),the second page of the document remains displayed at 1008. When thepressure of the object is no longer detected (i.e., the “No” branch from1010), the eBook reader device snaps back to the first page of theelectronic document and displays it at 1002. As described above in FIG.9, redisplaying the first page of the electronic document may optionallybe accompanied by a haptic and/or audio indication, such as a vibration,at 1012.

Searching for Books Based on Size or Available Time

An eBook reader device 102 may contain a large number of unabridgedeBooks. Organizing and sorting the books becomes increasingly importantas the number of books stored thereon increases. Users of the eBookreader device 102 may wish to identify books based on size or a timeparameter (such as available time to read, or the amount of time it willtake to read the book). With physical books, this may be accomplished bysimply looking at a book and evaluating its size. However, with eBooks,it is more difficult for a user to gain a sense of size of theelectronic documents.

This section of the disclosure discusses example techniques forsearching for documents based on size and/or a time parameter. Thesesearching and filtering parameters may be selected using various gestureinputs via the touch-screen display.

FIG. 11 shows a user interface representation 1100 for displaying a booklist 1102 on the eBook reader device 102. While books are shown in thisexample, it is noted that the book list 1102 may display lists of othertypes of electronic documents, including a mixture of document types,without departing from the spirit and scope of the description herein.For example, the book list 1102 may contain books, magazines,newspapers, periodicals, journals, reference materials, telephone books,textbooks, anthologies, instruction manuals, proceedings of meetings,forms, directories, maps, web pages etc.

In one implementation, the book list 1102 includes visual indicators ofbook length 1104 along with titles of the books. The visual indicatorsof book length 1104 may be bars or columns that represent length of thebooks in the book list 1102. In some implementations, the visualindicator may indicate an amount of the book that remains unread. Thevisual indicator is not limited to bars or columns, but may includeother representations such as a three-dimensional representation of abook that appears larger or taller in proportion to the size of otherbooks. In this example, the length of a horizontal bar corresponds tothe length of a book. The book list 1102 may be ordered according tobook length. Alternatively, the book list 1102 is ordered based on otherfactors, such as closeness of match to a search query, alphabetically,by date, price, or the like. In some situations, the book list 1102 maybe ordered according to a filter (e.g., search, user preferences, etc.)and secondarily by book length. In the illustration of FIG. 11, fivebooks are shown, with example titles ordered as follows: “Very LargeBook”, “Short Book”, “Medium Book”, “Large Book”, and “Very Short Book”.

The user may select one of the books in the book list 1102 by placing anobject (e.g., finger or stylus) on or near a part of the touch-screendisplay 104 that is, for example, displaying the title of the book. Inresponse, a subset of the book list 1102 is displayed. Books included inthe subset of the book list 1102 are determined by a size of the bookindicated by the user. In this example, the user is shown selecting the“Medium Book” with his finger. Size may be determined in various ways,such as by number of pages in the book, number of words in the book,number of characters in the book, or the like.

FIG. 12 shows a user interface representation 1200 that displays asubset 1202 of the book list 1102 shown in FIG. 11 following selectionof the “Medium Book”. The subset list 1202 may be ordered based on size.In this example, the subset list 1202 is ordered top-to-bottom fromlarger to smaller. The subset list 1202 may alternatively be orderedtop-to-bottom from smaller to larger. In one implementation, the subsetlist 1202 may also include visual indicators of book length 1204, asdescribed above in FIG. 11.

In this illustration, the subset list 1202 contains eBooks with a sizeequal to or smaller than the selected “Medium Book”. Hence, the books“Short Book” and “Very Short Book” are included in the subset list 1202.In other implementations, eBooks having a size equal to or larger thanthe size of the selected book, or eBooks are a next size larger or nextsize smaller, may be included in the subset list 1202. The subset list1202 may be thought of as the book list 1102 after filtering based on asize of the book indicated by the user.

As another option, the type of filtering applied to the book list 1102may depend on a type of object and/or a type of gesture that generatesthe indication on the touch-screen display 104. For example, selecting abook by pressing the title of “Medium Book” in FIG. 11 with two fingersmay filter the book list 1102 by removing books larger than theindicated book. In contrast, indicating a book by pressing the title of“Medium Book” in FIG. 11 with only one finger may filter the book list1102 by removing books smaller than the indicated book. As a furtherexample, indicating a book by pressing the title of the book and thenmaking a swiping gesture upwards may filter the book list 1102 byremoving books smaller than the indicated book, while making a swipinggesture downwards may filter the book list 1102 by removing books largerthan indicated book.

FIG. 13 shows a process 1300 for filtering a list of electronicdocuments using the touch-screen display 104 of the eBook reader device102. At 1302, a list of electronic documents is presented to the user onthe touch-screen display 104 of the eBook reader device 102. Asdescribed above in FIG. 110, the list of documents may include visualindications of document length. The list may be ordered or unordered.

At 1304, indication corresponding to one of the electronic documents inthe list is received. The indication may be generated by an object on ornear a portion of the touch-screen display 104 that is displaying atitle or other representation of one of the documents in the list. Inone implementation, the object is one or more of the user's fingers, butit may also be a stylus or other pointing mechanism.

At 1306, the list is filtered based on the indication made by the userto remove some of the documents and form a subset list. A subset list1202 is shown in FIG. 12, for example, following selection of a booktitle “Medium Book” from the list 1102 of FIG. 11. Creation of a subsetlist per act 1306 may be implemented in different ways. One exampleimplementation is shown in FIG. 13 with sub-acts 1306(1)-(3). At1306(1), a determination is made whether the user selected the documentlisted on the touch-screen display 104 using one finger or two fingers.This is detected through multiple pressure points on the screen. If theuser employs two fingers (i.e., the “Two” branch from 1306(1)),electronic documents larger than the indicated electronic document areremoved at 1306(2). If he uses one finger (i.e., the “One” branch from1306(1)), electronic documents smaller than the indicated electronicdocument are removed at 1306(3).

At 1308, the filtered list is presented to the user on the touch-screendisplay 104. The presentation may be similar to that discussed above inFIG. 12.

The above features allow users to search for books, and filter lists ofbooks, based on size. Another parameter that may be used is timeavailable to read a book or the time it takes to read a book given atthe reader's pace.

FIG. 14 illustrates a user interface representation 1400 of the eBookreader device 102 that allows a user to select a book based on time.This time parameter may represent different conditions, such as anamount of time available to read (e.g., 15 minutes left on a break) oran amount of time it will likely take the user to read the book (e.g.,at reader's rate, books or articles that can be completed in 15minutes). For such time-based filters, the eBook reader device 102calculates the user's reading speed. A typical reading speed may becalculated based on time between page-turn commands and a number ofwords or characters displayed on a page. Thus, the time it will take theuser to read the book is directly related to size and time-to-read maybe thought of as a proxy for size. However, unlike size, the time itwill take to read a book may be different for different users. The eBookreader device 102 may maintain multiple user profiles each associatedwith a respective reading speed.

In FIG. 14, the user interface 1400 depicts a graphical clock 1402 onthe touch-screen display 104. The user selects an amount of time bymaking a gesture with her finger (or stylus) in a clockwise circle 1404around the face of the clock 1402. The selected amount of timecorresponds to a distance the user has moved her finger along the clockface. In this example, the user has moved her finger in a quarter-circlearc, indicating 15 minutes of time. The user interface 1400 may alsoinclude a digital clock 1406 to show the selected time. In this example,the digital clock 1406 shows zero hours and 15 minutes. Further, theuser may select the time by moving the digits in the digital timerepresentation 1406.

Once a time is entered by the user, the eBook reader device 102 beginsto filter documents based on the time parameter. The eBook reader device102 determines a document size based on the indicated amount of time andthe user's reading speed. In this example, documents that the user canread in 15 minutes or less are identified. The eBook reader device 102then displays a list of documents that qualify given the timeconstraint.

FIG. 15 illustrates a user interface representation 1500 of the eBookreader device 102 that presents a book list 1502 in response to theamount of time entered by the user. The book list 1502 in this exampleincludes a very short book, a magazine article, and a poem. These areall items that the user should be able to read, based on past readingspeed, within the indicated amount of time (e.g., 15 minutes). Ofcourse, in any given instance, the user may read slower than his or hertypical reading speed, so in some instances the user may in actualitytake longer than the indicated amount of time to read items included inthe book list 1502.

Text-to-speech Conversion

In another usage scenario, a user may wish to convert from text tospeech. As described below with respect to FIGS. 16-18, the user mayemploy various input techniques with the touch-screen user interface toinitiate this conversion.

FIG. 16 illustrates a user interface representation 1600 of the eBookreader device 102 for converting text to speech. Processing of the userinput and converting text to speech may be performed in whole or part bythe text-to-speech module 118. The eBook reader device 102 displays avisible representation of text on the touch-screen display 104. The usermay indicate a portion of the text presented on the touch-screen display104 by placing an object on or near the portion of the touch-screendisplay 104 that is displaying the text. Upon receiving the user's textselection, the eBook reader device 102 may generate a spokenrepresentation of the text. In some implementations, the spokenrepresentation of the text is a synthesized human voice reading the textaloud. Sounds corresponding to the spoken representation of the text maybe generated by an output device such as a speaker or headphonesconnected to a headphone jack (or wirelessly via Bluetooth or othertechnologies).

A speed of the spoken representation of the text corresponds to a speedof the object moving across the touch-screen display 104. The object maybe one of the user's fingers, a stylus, or the like. The speed of thespoken representation may increase when the speed of the objectincreases, or conversely decrease when the speed of the objectdecreases. In some implementations, the speed of the spokenrepresentation is based on an average speed of the object movingrelative to text on the touch-screen display 104 rather than aninstantaneous speed of the object. For example, there may be a slightpause when the user moves her finger from the end of one line to thebeginning of the next line. To avoid a corresponding pause in thereading of the text, an average speed of the user's finger movingrelative to several words in the displayed portion of text may be usedto determine the reading speed. For example, the reading speed may bebased on the average speed of the object relative to the previous 10words so that momentary changes in the speed of the object do not affectthe reading speed.

In one implementation, a visual representation of the text changes whenthe text is indicated by placing an object on or near the touch-screendisplay 104, as represented by highlighting area 1602. The change of thevisual representation of the text may include highlighting, changing acolor of the text, underlining the text, or the like.

Due to the dual function of the touch-screen display 104 it is possiblefor the user to indicate a portion of text displayed on the screen bypassing an object over words displayed on the touch-screen display 104.Depending on the language and the formatting of the text, there may behorizontal or vertical text. The object, such as the user's finger, isgenerally moved over the text in the same direction as the text is read.For example, when the text is displayed horizontally on the touch-screendisplay 104, the object moves in a generally horizontal direction. Thedirection may be right-to-left or left-to-right depending on thelanguage of the text. When the text is displayed vertically the objectmoves in a generally vertical direction. Again, the direction may betop-to-bottom or bottom-to-top.

Concepts such as left/right and top/bottom depend on an orientation ofthe eBook reader device 102 such that if the user rotates the eBookreader device 102, a horizontal motion becomes a vertical motion. Insome implementations, the eBook reader device senses when itsorientation is changed and automatically adjusts the layout of the textof the display 104.

FIG. 17 illustrates an alternative user interface representation 1700 ofthe eBook reader device 102 for converting text displayed 1702 on thetouch-screen display 104 to speech. In this implementation, the speed ofthe spoken representation may be based on the speed of the objectrelative to a progress bar 1704 displayed on the touch-screen display104. For example, a slider bar or similar display functioning as aprogress bar 1704 may be presented alongside the displayed portion oftext 1702. By moving the object along the progress bar 1704 the speed ofthe spoken representation may be controlled. In some implementations ofthe progress-bar interface, only one motion relative to the progress baris sufficient to set a reading speed. The eBook reader device 102 maythen continue to read the displayed portion of text 1702 withoutrequiring the user to repeatedly move her finger along the progress bar1704.

FIG. 18 shows a process 1800 for using a touch-screen display 104 tofacilitate conversion of text to speech for excerpts of displayed text.At 1802, text of an electronic document is displayed on the touch-screendisplay 104 of the eBook reader device 102.

At 1804, an object is detected at it is moved across the touch-screendisplay to indicate an excerpt. The object may be the reader's finger, astylus, or other pointing mechanism. A visual representation of theexcerpt may change in response to the reader selection. This is shown,for example, in FIG. 16 where an excerpt 1602 is highlighted in responseto the reader's finger being moved across the area.

At 1806, a speed at which the object is moved across the touch-screendisplay is calculated. Speed may be computed in different ways. Oneapproach is to derive an average speed of the object moving relative toseveral words (e.g., 10 words) in the excerpt of text.

At 1808, the text in the excerpt is converted to speech. Moreover, thepace of the spoken representation corresponds to the speed of the objectcalculated at 1806. As the speed of the object increases across thedisplay, the pace of the spoken representation increases. Conversely, asthe speed of the object slows down, the pace of the spokenrepresentation slows as well.

Illustrative Ebook Reader Device

FIG. 19 illustrates selected functional components 1900 that might beimplemented as eBook reader subsystems 1902. In a very basicconfiguration, the subsystems 1902 include a memory 1904, a processingunit 1906, and a touch-screen display module 1908 for controlling eBookcontent output to the touch-screen display 104 as well as interpretingcommands received by the touch-screen display 104. The memory 1904typically contains an operating system 1910 of the eBook reader device102. The memory 1904 may also include one or more electronic documents1912 such as eBooks.

As described above, the touch-screen display 104 is adapted fordisplaying visible representations of textual or graphic content, suchas contents of an electronic book in digital form. For convenience only,the touch-screen display 104 is shown in a generally rectangularconfiguration in the implementations described herein. However, it isunderstood that the touch-screen display 104 may be implemented in anyshape, and may have any ratio of height to width. Also, for stylistic ordesign purposes, the touch-screen display 104 may be curved or otherwisenon-linearly shaped.

In some implementations, the touch-screen display 104 may be implementedusing electronic paper display technology. In general, an electronicpaper display is one that has a high resolution (150 dpi or better) andis bi-stable, meaning that it is capable of holding text or otherrendered images even when very little or no power is supplied to thedisplay. The electronic paper display technology may also exhibit highcontrast substantially equal to that of print on paper. Someillustrative electronic paper displays that may be used with theimplementations described herein include bi-stable LCDs, MEMS,cholesteric, pigmented electrophoretic, and others. One illustrativeelectronic paper display that may be used is an E Ink-brand display.

In the same or different implementations, the touch-screen display 104may be a flexible display. The flexible display may be positioned abovea touch sensor(s). The touch sensor(s) may be a resistive touchsensitive film. The flexible display may also include a protective layermade of a flexible material such as plastic. The flexible display mayalso include a flexible backplane layer. The backplane may also be madeof a flexible material, such as plastic, metal, glass or a polymer basedmaterial. A flexible backplane may be bendable, rollable, light-weight,etc. In one configuration, the flexible backplane is a matrix backplaneon a plastic substrate.

The eBook reader subsystems 108 may also include one or morecommunication connections 1914 that allow the eBook reader device 102 tocommunicate with other computer systems or other devices. Electronicbooks and other content, as well as program modules, may be transferredto the eBook reader device 102 via the communication connection(s) 1914.The communication connection(s) 1914 support both wired and wirelesscommunications with various types of networks, including the Internet.For example, the eBook reader device 102 may be equipped with an RFtransceiver to facilitate wireless communication over a wirelessnetwork. The device may further include a communication connection thatfacilitates communication with other devices via, for example, aBluetooth or IR connection. The communication connection(s) 1912 are oneexample of communication media. Communication media may typically beembodied by computer readable instructions, data structures, programmodules, or other data in a modulated data signal, such as a carrierwave or other transport mechanism, and includes any information deliverymedia.

One or more user interface subsystems 108 are also provided to captureuser input via the touch-screen display 104, the keyboard 106, and anyother user input element on the eBook reader device 102. The userinterface subsystems 108 are discussed above in more detail in FIG. 1.

The eBook reader subsystems 108 also include a power control unit 1918and a battery 1920. The power control unit 1918 operatively controls anamount of power, or electrical energy, consumed by the eBook readerdevice 102. Actively controlling the amount of power consumed by theeBook reader device 102 may achieve more efficient use of electricalenergy stored by the battery 1920. The processing unit 1906 suppliescomputing resources to the power control unit 1918. The power controlunit 1918 may further include a clock/timer for accurate control ofpower consumed by the eBook reader device 102.

The eBook reader device 102 may have additional features orfunctionality. For example, the eBook reader device 102 may also includean audio output module 1922 for controlling the generation of soundssuch as synthesized speech. Output from the audio output module 1922 maybe directed to an on-board speaker 1924 or another output device such asa head-phone jack. The eBook reader device 102 may also includemicrophone(s) 1926 for recording sound such as the user's voice and/orfor detecting taps on the display to localize a point of contact on thedisplay as described above in relation to FIG. 3. In someimplementations the eBook reader device 102 may also include a vibrator1928 or other output device for creating a haptic output that isdetectable by a user touching the eBook reader device 102. The eBookreader device 102 may include, in some implementations, an accelerometer1930 for detecting the orientation of the device. Other output device(s)such as an auxiliary display, printer, etc. may also be included.

The memory 1904 is an illustrative example of computer-readable storagemedia. Thus, computer-readable storage media include, but are notlimited to, RAM, ROM, EEPROM, flash memory or other memory technology,CD-ROM, digital versatile disks (DVD) or other optical storage, magneticcassettes, magnetic tape, magnetic disk storage or other magneticstorage devices, or any other medium which can be used to store thedesired information and which can be accessed by the eBook reader device102. Any such computer-readable storage media may be part of the eBookreader device 102.

Various instructions, methods, and techniques described herein may beconsidered in the general context of computer-executable instructions,such as program modules, executed by one or more computers or otherdevices. Generally, program modules include routines, programs, objects,components, data structures, etc. for performing particular tasks orimplement particular abstract data types. These program modules and thelike may be executed as native code or may be downloaded and executed,such as in a virtual machine or other just-in-time compilation executionenvironment. Typically, the functionality of the program modules may becombined or distributed as desired in various embodiments. Animplementation of these modules and techniques may be stored on ortransmitted across some form of computer readable media.

CONCLUSION

Although the subject matter has been described in language specific tostructural features and/or methodological acts, it is to be understoodthat the subject matter defined in the appended claims is notnecessarily limited to the specific features or acts described. Rather,the specific features and acts are disclosed as illustrative forms ofimplementing the claims.

What is claimed is:
 1. A computer-implemented method comprising: presenting a list of electronic documents on a touch-screen display; detecting an object applied to the touch-screen display as an indication of user selection of one of the electronic documents in the list; filtering the list of electronic documents based on a size of the selected one of the electronic documents to create a filtered list of electronic documents; and presenting the filtered list of electronic documents on the touch-screen display.
 2. The computer-implemented method of claim 1, wherein the electronic documents comprise electronic books, and the touch-screen display is embodied as part of a dedicated handheld book reader device.
 3. The computer-implemented method of claim 1, wherein the filtering comprises removing electronic documents larger than the selected one of the electronic documents from the filtered list.
 4. The computer-implemented method of claim 1, wherein the filtering comprises removing electronic documents smaller than the selected one of the electronic documents from the filtered list.
 5. The computer-implemented method of claim 1, wherein the object comprises at least one of a stylus or one or more fingers.
 6. The computer-implemented method of claim 1, wherein the object comprises one or more fingers, and the filtering comprises: removing electronic documents larger than the indicated one of the electronic documents from the filtered list when two fingers are detected; and removing electronic documents smaller than the indicated one of the electronic documents from the filtered list when one finger is detected.
 7. The computer-implemented method of claim 1, wherein the presenting the filtered list of the electronic documents comprises visually ordering the electronic documents on the touch-screen display according to the size.
 8. The computer-implemented method of claim 1, further comprising visually conveying an indication of size of each of the electronic documents in the filtered list.
 9. The computer-implemented method of claim 1, wherein the size of the selected one of the electronic documents comprises an amount of the electronic document that remains unread.
 10. A computer-implemented method comprising: presenting a user interface that allows a user to enter a time available to read an electronic document; filtering a list of electronic documents based on the time available to read to create a filtered list of electronic documents; and displaying the filtered list of electronic documents.
 11. The computer-implemented method of claim 10, wherein the presenting comprises providing a graphical user interface on a touch-screen display.
 12. The computer-implemented method of claim 10, wherein the presenting comprises depicting at least one of a representation of an analog clock or a representation of a digital clock.
 13. The computer-implemented method of claim 10, wherein the analog and digital clocks are depicted on a touch-screen display, and further comprising detecting user input via application of an object on the touch-screen display to enter the time available to read.
 14. The computer-implemented method of claim 10, further comprising calculating a length of an electronic document as a function of the time available and a reading speed of the user, and filtering the list of electronic documents in part due to the calculated length.
 15. The computer-implemented method of claim 10, further comprising ordering the electronic documents in the filtered list according to the length.
 16. One or more computer-readable storage media having computer-readable instructions stored thereon that, when executed by an electronic device, perform acts comprising: presenting a list of electronic documents; receiving a selection of a one of the electronic documents in the list; in response to receiving the selection, filtering the list of electronic documents based on a size of the selected one of the electronic documents to form a subset of the list; and presenting the subset of the list of filtered electronic documents.
 17. The one or more computer-readable storage media of claim 16, wherein the subset of the list of electronic documents comprises at least one of: electronic documents having a size equal to or larger than the size of the selected one of the electronic documents; or electronic documents having a size equal to or smaller than the size of the selected one of the electronic documents.
 18. The one or more computer-readable storage media of claim 16, wherein the subset of the list of electronic documents is ordered based on size.
 19. The one or more computer-readable storage media of claim 16, wherein the size is measured by at least one of a number of pages, a number of words, or a number of characters.
 20. The one or more computer-readable storage media of claim 16, wherein the size is calculated as a function of how long a user would take to read the electronic document.
 21. The one or more computer-readable storage media of claim 16, wherein the receiving a selection comprises detecting an object applied to a touch-screen display.
 22. The one or more computer-readable storage media of claim 20, wherein the object comprises at least one of a finger or a stylus.
 23. The one or more computer-readable storage media of claim 20, wherein the object comprises one of one finger or two fingers, the filtering forming different subsets of the list depending upon whether one finger or two fingers are detected.
 24. An electronic device comprising: a processor; a memory accessible by the processor; a touch-screen display to receive a gesture indicative of one of (1) selection of an electronic document or (2) entry of a time; a filter module stored in the memory and executed by the processor to filter, responsive to the gesture, a set of electronic documents according to size to form a filtered list of electronic documents.
 25. The electronic device of claim 24, wherein the gesture is made relative to a representation on a clock on the touch-screen display to enter the time, and the filter module filters the set of electronic documents to find ones of the electronic documents that can be read within the time.
 26. The electronic device of claim 24, wherein the size is measured by at least one of a number of pages, a number of words, or a number of characters.
 27. The electronic device of claim 24, wherein the size is calculated as a function of how long a user would take to read a remaining unread portion of the electronic document.
 28. The electronic device of claim 24, wherein the size is calculated as a function of how long a user would take to read the electronic document.
 29. The electronic device of claim 28, wherein the memory stores a plurality of user accounts, each user account being associated with a respective reading speed.
 30. The electronic device of claim 24, further comprising a bookmarking module stored in the memory and executable by the processor to bookmark a first page of the electronic document temporarily in response to continuous pressure being applied to the touch-screen display, while allowing one or more pages to be turned to display a second page, the bookmarking module causing a return to display of the first page upon removal of the pressure.
 31. The electronic device of claim 24, further comprising a text-to-speech module to convert to speech a portion of text selected form the electronic document via detection of pressure applied to the touch-screen display. 